An interview on Forbes talks with Mike Capps, President of Epic Games about the developer's future plans (thanks Eurogamer). Along the way he explains that they are not working on any Unreal/Unreal Tournament games at the moment, though there's no word on whether they have any Jazz Jackrabbit projects in the works. Here's word:

Unreal and Unreal Tournament continue to have a huge influence on the studio here, even though we’re not currently working on an Unreal IP project. Epic’s core game making philosophy of “when everyone says it’s done, keep polishing!” came from our experiences with Unreal Tournament. That’s the beginning of our quality-focused studio DNA.

Beamer wrote on Sep 21, 2011, 19:06:Yup, except I disagree that Quake had a plot.

Quake had Axes.

In the end, that's all that mattered.

^D^

Haha, yeah I mean that all of those games had at least one of those qualities; interesting characters, monsters, or plot. With Quake it was the all about the monsters, weapons and ambiance. I still find the Quake monsters far more memorable than the strogg strogg strogg of later installments.

It wouldn't be possible for me to agree more withing the confines of this universe.